How to test a car battery with a right tester？

Every car has a battery and will eventually have problems until it no longer works, so it is essential to diagnose your car battery properly. Read this article to learn how to test a car battery with the correct tester.

Due to the lack of traditional means of testing batteries, battery dealers and auto repair stations, and car dealers often return good batteries to manufacturers as bad batteries. According to INTERSTATE, an auto battery distributor in the U.S., 50% of the so-called bad batteries returned is good. These batteries need to be recharged, not replaced. This part of the good batteries, simply because of Erroneous judgment, needlessly going back and forth between manufacturers and dealers, causing mutual consumption in vain. In addition, because many auto repair outlets lack efficient inspection tools, they fail to detect weakened batteries in time before owners encounter problems, thus losing the opportunity to sell batteries potentially.

Traditional auxiliary tests such as specific gravity indication and terminal voltage reflect the battery’s state of charge (SOC), not its health (SOJ). Therefore, it cannot be used as an effective way to check whether the battery needs to be replaced.

Proper battery testing makes it easier to find out what’s wrong with your battery. Learn how to test your car battery in detail using a dedicated battery tester. You can use a multimeter, but you won’t get detailed information about what’s going on inside your battery.

We recommend you a powerful and very good professional car battery tester – AUTOOL BT760. AUTOOL BT760 Car Battery Tester is designed with a color screen and an easy printer for a better user experience. Adopting the advanced conductance testing technology, BT760 provides you with accurate testing results and prints them in seconds.

Step by step project with AUTOOL BT760

1. Open the hood and find the battery

2. Connect the battery tester

Remove the plastic protective cover of the battery

Connect the black cable clip of the battery tester to the negative terminal of the battery

Then connect the red cable clip to the positive terminal of the battery

3. Test the voltage

Use the voltage test mode to check the battery status. Most car battery voltages are 12V, some are 24V, you can use a simple voltmeter to test, but a battery tester will also work.

4. Perform Cranking Test

Set your battery tester to cranking test mode, then start the vehicle. Your tester will record the lowest voltage that the battery is able to maintain while the starter motor is working.

5. Conduct a load test

Select the maximum load test function, turn on the car appliance, start the car engine, click OK, and wait for the result to come out.

6. Charging test

After entering the charging test function, follow the instructions to increase the speed to 2500 rpm for 5 seconds, then press OK. Wait for the result to come out, and then the test is finished.

7. Print test results

After the test is completed, there will be a print option. Click OK to print the battery test results.

BT760 automotive battery tester features more than that. It also has a wide range of applications. An ultra-wide range professional tester with ratings from 100 to 3000 CCA. Compatible with cars, motorcycles, trucks, RVs, ATVs, SUVs, boats, yachts, lawnmowers and even golf carts. It uses reverse polarity protection so that neither the battery nor the equipment will be damaged. Up to 12 languages are supported, and other language versions can be customized.

Most importantly, a 3-year free warranty is available. For damage not caused by human factors, AUTOOL promises to resend parts for free within 3 years. If you are interested in this product, you can watch the video below or click the link here to see the product details.